Combined pestle and mercury dispensing apparatus



@efio 4,1, F. F. MARSGHALK 2g43 @5@ COMBINED PESTLE AND MERCURYDISPENSING APPARATUS Filed NOV. 19, 1.945

Patented Oct. 4, 1949 COMBINEDVP-ESTLE AND. MERCURY DISPENSINGAPLPKRKTUS FrddefimczFzfMansohalkieuglusta,EGa. ApplicatiofiNovexnberlm1945,"SerialNo.629,364

This invention relates to acombined "pestle and dispensing meanstherefor.

"Here before it has 1: en 'comrn-on practice to provide amalgamo-entalings'i'iy placin'g -a-snitable amount of'all-oy- ,l'l'lOItal and th'enadd a quantity of mercery to the mortal enamel-gamation with the alloyin which the amalgamating-process was accelerated-p 1*the'use o apostlein-triturating-and mixing the materials.

' I have found that -'I canproceefi more *erpeclitiou'slyand* accuratelyby providing' a' reservoir for mercury wi'thin thharidlefif til-apostle.

It isan object or my invention to "provide a reservoir in the emale of apestle including a valve oontrolledo-ispen'sing and measuring means tofeed a quantityof' mercury flownover the elite of the pestle bodyinto-the mortarand npon the alloy or metallic-mix avithin the mortar.

It is "an object-of my invention to provide pestle hanole with '--aremovable capcomprising a flanged ring in combinationwvith-a stretchablediaphragm which "togethenmay-serve as a base for the*appariztuswvherbythe apparatus stood an inverted upright'positionion-a "substantiallyhorizontal support-when not in use.

It isan object of-this-inventionto provide an elastic flexible--diaphragm 'attacha'bly "and "detacha-bly secured-on the enclof thepestle handle by a fianged'ring.

It is -an-object of thisiinvention totprovide an attachable anddetachable pestle body for the handle whereby 'anold worn-ontpe'stle"booy'may be replaced by a new one.

Titis an object of i this invention to provide a valve body that isspringactuated 'to olose'd'gpo'sition by a spring 'andmanually.a'tcthaitedto an open position by"fin'ger=pressurei(m "a resilientflexible diaphragm.

It isan-ob-jeet of' my invention'to provide a receiving compartment forreceivingthe memory from the Valve controlled res ervoir :and to 1 guideand conduct the charge of 1'nerc'urygravitationally down and over "aninclined portion of the pestle 'body' through an 'exit' located \at thebottom of'the inclined portion wherebythe charge of mercury is depositedin themo'rtar.

It is also 'aryobject of'tliis invention to make the pestle 'handle'of"substantially transparent plastic materiatwh'ereby the contents ofthe-reservoir-maybe'notedfromtime to time.

Other objects 'andadvantages willberevealed in connectionwiththedetailedldescription of-the accompanying Jdrawings v'vhich "form.a .part =01 the specificationand in which:

l'is'a'sectional view or my neWoiSpensing' pe'stle, taken oentrally andlongitudinally thereof and showing 'the control valve "closed.

l 'ig fl is simila'r o' -Figfl" except thatthe control va lvelis-i'epressecl positionafter thei'emercury, and

to $1 41 except that inerouryds being :oispen'sed withoiitbeing-measured. -IIh-'e-;dra-wings lea-re me-rely il lustrative :andnotdefinitive ?0f umy invention except as neen'ea hy the subject matter:elaime'd herein.

'I'he reference :oharacters identify the .pai'ts disclosed-in both-thedrawings andispecifications.

@Imthedrawingthe pestle consistszof :a: hollowsi-ibstantiallytransparent handle 2. constituting a :reservoir'l3 -contain-ing: mercury4.

'lSincethe contentsof the reservoiri-is to be visibly observed it willbe. suflicient to usetranslucent materiali'f so desired.

"The fplastichandle may be made of molded phenolic "plastics, methylmethacrylate ,plasties, vinyl resin plastics, polystyrene plastics,acrylic resins, cellulose acetate, ethyl celliilosaetc.

The hanole- 2' isprovfded vvitha'cor'nbi-ned valve seat andvalvwstemjguide "5. "The handle '2Iis provided with an"exten"sion6"10'e'y0'n'cl the valve seat and receives one end 'of'apestlebody 7which i'scleitaeha-blyse'cnreol hereinby any soft-able s61- iible iueli. The pestle mew 'i's'provi'ded with an inc lecl end *9 '--locatedwith iifthe "extension 6. The extension t is-provided with an exitorifice" I'll unseat the lowest'portion of the inclineiiefid9.

Ihe tiarbiil'ar =extension 6 "of "the handle forms a oonnection Withtl'repestle "'1, said connection (tonstitiite's-a doint'atfd'the exitoi'i'fic'e ID is 10- eateddn the'connection"or ioint. The exit orificemopens on the'outside ofthejpestleand conducts or guides the mercuryover"theontside'"surface portion df the pestle-*1.

A valvestem I isprovided with a valveh'ea'd fi oooperating w-ith thevalve seat and-'gui'de 5. Theivalveste-m l l -is also provid'clwitharecluced portion its conneoting *the *valve head with 'the remaindermf*the walve stem I. This reduced portion [3 forms a passageway from thereservoir 3' tofz'the compartment M. The upperend of "the valvestem l lis provided ith a-'remova-ble'-knob pretenaiblyi-serew threaded to 'theendofth'estem I l and. located substantially flush 'Wit-h the upper endot the reservoir- 3;

:A 'flexibleelas" stretehab'le diaphragm [Ii-extendslover the topthe-tubular reservoir in engagement with theflknobili and is s'ecureiitothe reservoir-i3 :b y'? Thezvalvezstem 1S sorrounded by ahelioalcom-;pressionispringg mipreterably made'ofcatbon steel or any suitablematerial that will not amalgamate with the mercury.

The valve stem II and the valve head I2 and the knob I5 may be made ofsubstantially pure iron or any suitable material such as plasticmaterial that will not amalgamate with the mercury.

If the valve stem II, the knob I5 and valve head I2 are made from asuitable plastic material, such as specified for making the hollowhandle, then the plastic material for said valve stem etc. need not bemade of transparent or translucent material.

The pestle body I may be made of porcelain or any suitable plasticmaterial. The exit orifice III is formed in the connection or joint ofthe tubular extension 6 with the pestle I. The exit orifice I leads froma position above and at the lowermost portion of the incline or ramp 9to the outer surface portion of the pestle I, so that the mercury canroll down or descend on the pestle into the mortar I9 without excessivesplashing.

The mortar I9 is conventional and forms no part of my invention but isdisclosed merely to visualize clearly the use and operation of mycombined pestle and dispensing device or apparatus.

When the manufactured parts are ready for assembly the valve stem I I isinserted through the valve seat and guide and the spring I8 is placed inposition surrounding the stem I I.

The spring I8 is depressed so that the knob I5 may be applied to thevalve stem II to maintain the spring under tension. Now the stretchablediaphragm I6, which is preferably made of rubber, is placed over the endof the tubular hollow handle and secured in position thereon by thescrew threaded flanged ring II. The pestle body I is detachably securedin place by a soluble cement or glue so that an old Worn-out pestle bodymay be removed by dissolving the glue in water or other appropriatesolvent.

In operation the apparatus comprising the pestle is used in the ordinaryway in connection with a mortar containing the dental filling alloy ormix. When it is desired to dispense a charge of mercury the valve isdepressed by a finger tip of the operator as indicated in Fig. 2. If therelease of a charge of mercury is not sufficient to make the amalgam ofproper consistency a further charge may be added by repeating theoperation of depressing the valve against the tension of the spring. Ifmore than a measured charge is desired the pestle may be operated asindicated in Fig. 3. If it is desired to empty the reservoir 3 the valvemay be maintained in an open position as clearly indicated in Fig. 3.

In Fig. 2 it is to be noted that the valve stem I I exactly fits thevalve seat outlet and cuts off the exit of mercury 4 from the reservoir3 so that the stem II serves as a sliding cut-off valvewhereas the valvehead I2 operates as or similar to a poppet valve of an internalcombustion engine.

It is also to be noted that the inclined end 9 of the pestle body Iserves as a stop to prevent excessive range of movement of the diaphragmI6 as shown in Fig. 2.

When it is desired to place the pestle in an out of use position it maybe inverted and supported in that position on a substantially horizontalsupport thereby using the ring H as a base.

While I have described my pestle as being particularly useful inconnection with the dispensing of mercury over a pestle body it appearsto bev self evident that it could be used for dispensing other liquidsas well as powdered material.

Having fully disclosed my said invention what I claim is:

1. In a combined pestle and mercury dispensing means therefor,comprising a tubular transparent handle defining a mercury containingreservoir, said handle having a tubular extension receiving one end ofsaid pestle, said pestle being glued in said tubular extension defininga joint, said joint having an exit orifice therein opening on thesurface portion of said pestle, said handle having therein a valve stemand a valve head said head being connected to the valve stem by areduced portion of said stem in combination with a combined valve stemguide and valve seat portion, spring means on said stem to actuate saidvalve head to closed position against said valve seat portion in furthercombination with a stretchable diaphragm secured over the end of saidtubular handle by a screw threaded flanged ring, a knob disposed on theend of the valve stem and in contact with said diaphragm whereby saidvalve stem and valve head may be operated to release a charge of mercuryfrom said reservoir on to the surface portion of said pestle.

2. In a combined pestle and mercury dispensing means therefor,comprising a tubular plastic substantially transparent handle saidhandle defining a mercury containing reservoir, said reservoir havingadjacent one of its ends a transverse portion defining a combineddispensing opening, a valve stem guide and a valve seat, the upper endof said tubular handle being closed by a stretchable diaphragm, saiddiaphragm being secured in position by a screw threaded flanged ring, incombination with a valve stem having a valve head on one of its ends anda detachable knob on its other end, said knob being in contact with thediaphragm whereby said valve stem and valve head may be operated byfinger pressure on said diaphragm said pestle having a fiat inclinedupper end portion, said handle having on its lower end a tubularextension receiving said upper end portion of said pestle, including itsinclined portion, in further combination with an exit orifice locatedabove but at the bottom of said inclined portion and between saidextension and pestle whereby said mercury may be conducted down over theouter surface of the pestle into the mortar without excessive splashingor spattering of the mercury.

3. In a combined pestle and dispensing means therefor, comprising atubular plastic transparent handle said handle defining a reservoir formercury, said handle having a transverse portion located intermediatethe ends thereof, said transverse portion defining a combined dispensingopening, a valve stem guide and a valve seat, a valve stem having avalve head co-operating with said valve seat, said valve stem extendingthrough said dispensing opening and valve stem guide, said valve andvalve stemv being provided with operating means, in combination with atubular extension on said handle located below said transverse portionand receiving the upper end of a pestle body, said pestle body having afiat inclined upper portion to form a guide for the dispensed mercury,said extension having an exit orifice the major portion of said orificebeing located between itself and the lowest position of said inclinedportion, and leading from a position above but at the lower most portionof said inclined portion whereby mercury may be dispensed over anoutside surface portion of the pestle body, said pestle body beingdetachably secured in said ex- Number tension by a soluble glue. 210,360FREDERICK F. MARSCHALK. 576,992 862,630 REFERENCES CITED 6 1 3 5 3 Thefollowing references are of record in the 1,365,350 file of this patent:1,970,193 2,203,089 UNITED STATES PATENTS 2,281,051 Number Name Date 102,331,672 56,063 Keep et a1 July 3, 1866 2,392,907

6 Name Date Rawlins Nov. 26, 1878 Hayball Feb. 9, 1897 Garvey Aug. 6,1907 Bauer Jan. 18, 1921 Garvey July 5, 1932 Molyneux-Seel et a]. Aug.14, 1934 Hollenbeck June 4, 1940 Roger Apr. 28, 1942 Falkman Oct. 12,1943 Driscoll Jan. 15, 1946

